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A069685 Denominators of coefficients in -log(1+x)log(1-x) power series. 1
1, 12, 180, 1680, 12600, 166320, 2522520, 576576, 22054032, 465585120, 2560718160, 64250746560, 348024877200, 1124388064800, 4990906206000, 165032631878400, 350694342741600, 2599263952084800, 101515697684200800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..19.

CROSSREFS

Cf. A049281.

a(n) seems to be n times A076100(n). - F. Chapoton, Nov 09 2009

Sequence in context: A227714 A130550 A073975 * A000515 A241710 A318245

Adjacent sequences:  A069682 A069683 A069684 * A069686 A069687 A069688

KEYWORD

easy,frac,nonn

AUTHOR

Benoit Cloitre, May 03 2002

STATUS

approved

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Last modified August 9 02:14 EDT 2020. Contains 336310 sequences. (Running on oeis4.)